Shot-feed for drills.



PATENTED MAR. 6, 1906. I K. BROOKS. SHOT FEED. FOR DRILLS. APPLICATION FILED FEB.25. 1905.

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45 I ing to that of a diamond-point on an or inary UNITED STATES PATENT. OFFICE.-

. I KARMELL BROOKS, OF NEW YORK, N. Y.

SHOT-FEED FOR DRILL S- Specification of Letters Patent.

Applioationfiled Pebruary26,1905. Sana1No.247,266.

Patented March 6, 1906;

To all whom it may concern:

Be it known that I," KABMELL BRooKs, a citizen of the United States, and a resident of. the city of New York, borough of Man'- hattan, in the county and State of New York, have invented a new and 'Im roved Shot-Feed for Drills, of which the fo lowing is a full, clear, and exact description.

The urpose of my invention is to provide a simp e and economic device for automatically feeding shot or grinding material to drills and similar tools, being particularly adapted for feeding shot to rotary drills employed in boring wells.

Another purpose of the invention is to provide a feeding device for the purpose described which will be automatic. in its action manner.

always be presente and means for regulating the quantity of ma'' terial delivered by the device, the feed being constant While the device is in operation.

The invention consists in the novel construction and combination of the several parts, as will be hereinafter fully set forth, and pointed out in the claims. 1

Reference is to be-had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in both the figures.

Figure 1 is a vertical section through a por" tion of ground in which a boring has been made, a sectional side elevation of the boringtool, and a transverse section through the feed device; and Fig. 2 is a side elevation of the improved feeding device.

A represents a section of hard substance in which a boring 10 is being made, B the drill-head inclosing the core 11, and B" the rod extending up from the drill-head, the rod and drill-head being rotated in any approved In the form of drill-head shown shot 12 or small spherical bodies of metal are fed to the lower edge of the head, which as the head is revolved has'a cutting action corres 0ndreci rocating drill.

series of apertures 13 in preferably staggered arrangement, so that as the drill wears away an irre ular cutting edge will to the material oper-' ated upon, so that cavities will be formed at ing is to be made, one of the trunnions being provided with a pulley 16, driven from any convenient source of power. This cylinder is. adapted to contain the shot'12 or equivalent material and is provided with an opening 17 preferably in its circumferential surface, for the exit of the material contained in the cylinder.

In order that the supply of material mag be regulated, the opening 17 is provided wit an adjustable gate or cover 18, externally located on the cylinder, and the cylinder may .be more or less dished where the opening is located to insure all the material finding its way to the opening while the cylinder is rotated. The gate 18 may be of any approved construction. In the'drawings it is shown as provided with slots 19, through which guide- I screws 20 are passed into the cylinder, the gate being held in said-position'b tightening up the said screws. It may ere be remarked that should the cylinder be stopped With the o ening 17 at or near the bottom but few of the shot would escape, as 'in a mass of shot they naturally so pack themselves at the o enin in a stationary object as to completel y bri ge the opening, finding an exit only when the object is in motion.

In'connection with the cylinder D, I employ a chute or trough E, arranged, for example, as is shown in Fig. 1, to receive the shot from the cylinder and conduct them to the borin where they dro to the bottom of the dril -head, referably etween the wallof the boring an the outer face of the said drill-head; but the shot may be otherwise directed to the point of action, if so desired. Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. In a shot-feed for drills, a rotatable re- In testimony whereof I have signed my ceiver having e discharge-opening, and a name to this specification in the presence of conductor beneath the receiver. two subscribing witnesses.

2. In a shot-feed fordrills, a rotatable re- KARMELL BROOKS.

5 ceiver having a dischargeopening, an ad. Witnesses justable cover for the said opening, and. a con- J. FRED. AoKER,

ductor supported adjacent to the receiver. JNo. M. BITTER.- 

